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Myford Ml7

Wrong tool post

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Darren Baillie12/01/2016 20:49:17
2 forum posts

I recently bought a ML7 to do some small turning jobs for some other projects i am working on and have the ability to make spacers and little bits that i normally have to get from evilbay or pay my local machine shop to make .

After wasting some stock trying to learn thinking it was the tool or me.. or the lathe i finally found i had been supplied with the wrong tool post (see picture)

Now i could just go and buy the correct one .. but thats to easy :P Can anyone tell me correct thickness of the bottom plate for a ML7 ?

Regards

Darren

John Stevenson12/01/2016 20:57:15
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5068 forum posts
3 photos

There is no 'correct' thickness, it all depends on the size of the tool you are using.

If the one in the picture is 1/2" then dropping to 3/8" will cure all the problems.

Seriously think about getting a quick change toolpost as these 4 way things are very limiting.

Robbo12/01/2016 22:55:55
1504 forum posts
142 photos

Darren,

The tool holder is probably the "right" size, but the tool is too big. The original Myford 4-way toolpost was designed to take 5/16" tools. Bigger tools were catered for by a different holder system..

Darren Baillie13/01/2016 00:16:01
2 forum posts

hmm the tools i have are 12mm .. and 5/16th are about 8mm and its about 4mm out .. nice job robbo

stevetee13/01/2016 00:57:56
145 forum posts
14 photos

Even when you get smaller tooling , you still have to faff about getting the top of the tool exactly at the centre of the job, so it cuts right, there is no tool that's just right straight from the shop. You have to shim under the tool with thin shims or bits of sheet metal to bring the nose of the tool up to the right height. If it's too high, you are stuffed as I discovered with my ML10 , I'm now on 1/4 " thick tools with the quick change toolpost.

Edited By stevetee on 13/01/2016 00:58:34

Martin King 213/01/2016 05:30:25
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1129 forum posts
1 photos

Hi Darren,

I have been EXACTLY in your shoes when I got my ML7! Bite the bullet and get a Quick Change Tool Post. It makes machining fun instead of a real chore! 8mm tooling for ML7 is right. I bought some 10mm in error and had to mill the bottoms by 2mm.

Rgards,

Martin

Hopper13/01/2016 06:04:06
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7881 forum posts
397 photos

Blimey, I don't know what all the complaining about 4-way toolposts is for. I just made a four-way for my old Drummond and it's a giant step forward from the old Norman patented toolpost that took only one toolbit and had to be reset to centre hieght every time you either changed toolbit or changed the angle of approach of the current toolbit.

Four toolbits in place, each shimmed to correct height: that's luxury that is.

Bazyle13/01/2016 07:32:52
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6956 forum posts
229 photos

I think you need to get a book for beginners. There have been several threads on here recommending some. It will tell you a lot more that you obviously need to know, You may be able to find 'know your lathe' free online somewhere.

Getting the tool on centre is just the start that the book would have told you. You only need 1/4 inch fool bits for a small lathe like the Myford so get HSS tool blanks and a grinder. It is quite easy and a bit of preparation will give you a better finish. Shimming to height is easy with bits of scrap, bits of tins and even hard plastic like CD cases.

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